diff --git a/src/Captcha/GoogleRecaptcha.php b/src/Captcha/GoogleRecaptcha.php
index 4fa9d76..16f3e25 100644
--- a/src/Captcha/GoogleRecaptcha.php
+++ b/src/Captcha/GoogleRecaptcha.php
@@ -79,7 +79,7 @@ public function getElements(Element $element, Form $form): array
         $element->attributes->set('hidden');
 
         // Placeholder Element that actually displays the captcha
-        $placeholderId = sprintf('%s_placeholder', $controlId);
+        $placeholderId = \sprintf('%s_placeholder', $controlId);
 
         $placeholder = new Element('div.palmtree-form-control.g-recaptcha');
 
@@ -96,7 +96,7 @@ public function getElements(Element $element, Form $form): array
         $placeholder->attributes->setData('site_key', $this->siteKey);
         $placeholder->attributes->setData('form_control', $controlId);
 
-        $onloadCallback = sprintf('%s_onload', str_replace('-', '_', $controlId));
+        $onloadCallback = \sprintf('%s_onload', str_replace('-', '_', $controlId));
         $placeholder->attributes->setData('script_url', $this->getScriptSrc($onloadCallback));
         $placeholder->attributes->setData('onload', $onloadCallback);
 
@@ -133,7 +133,7 @@ private function getScriptSrc(string $onloadCallbackName): string
         $queryArgs['onload'] = $onloadCallbackName;
         $queryArgs['render'] = 'explicit';
 
-        return sprintf('%s?%s', strtok($url, '?'), http_build_query($queryArgs));
+        return \sprintf('%s?%s', strtok($url, '?'), http_build_query($queryArgs));
     }
 
     /**
diff --git a/src/Exception/InaccessiblePropertyException.php b/src/Exception/InaccessiblePropertyException.php
index 34146c8..2d22d9a 100644
--- a/src/Exception/InaccessiblePropertyException.php
+++ b/src/Exception/InaccessiblePropertyException.php
@@ -8,6 +8,6 @@ class InaccessiblePropertyException extends OutOfBoundsException
 {
     public function __construct(string $property, object $object)
     {
-        parent::__construct(sprintf("Property %s is not accessible on object of type '%s'", $property, $object::class));
+        parent::__construct(\sprintf("Property %s is not accessible on object of type '%s'", $property, $object::class));
     }
 }
diff --git a/src/Exception/UnsettablePropertyException.php b/src/Exception/UnsettablePropertyException.php
index 217782b..95e60e5 100644
--- a/src/Exception/UnsettablePropertyException.php
+++ b/src/Exception/UnsettablePropertyException.php
@@ -8,6 +8,6 @@ class UnsettablePropertyException extends OutOfBoundsException
 {
     public function __construct(string $property, object $object)
     {
-        parent::__construct(sprintf("Property %s is not settable on object of type '%s'", $property, $object::class));
+        parent::__construct(\sprintf("Property %s is not settable on object of type '%s'", $property, $object::class));
     }
 }
diff --git a/src/TypeLocator.php b/src/TypeLocator.php
index 273a26c..4b20f24 100644
--- a/src/TypeLocator.php
+++ b/src/TypeLocator.php
@@ -67,7 +67,7 @@ public function getTypeObject(TypeInterface|string $type, array $args): TypeInte
         if ($class === null) {
             throw new InvalidTypeException('Type could not be found');
         } elseif (!is_subclass_of($class, TypeInterface::class, true)) {
-            throw new InvalidTypeException(sprintf("Type must be an instance of '%s'. '%s' given", TypeInterface::class, $type));
+            throw new InvalidTypeException(\sprintf("Type must be an instance of '%s'. '%s' given", TypeInterface::class, $type));
         }
 
         foreach ($args as $key => $value) {